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In Mexico a great number of diseases spread by the mosquitos Aedes has been reported. There are some regions on the country that this number is alarming. The spread of this disease becomes a public health problem and the government is worried about this situation and applied some methods for reducing the infection rate. One of principal methods relies on the localization of the mosquito's larvae and...
This paper proposes a watermarking scheme robust against most common geometric and signal processing operations, for applications that require an accurate detection of the owner watermark even if the digital image suffers intentional and non-intentional attacks. The proposed scheme is based on two modifications introduced in two 2D histograms. In the first modification a selected region of a 2D histogram,...
This paper presents a new robust watermarking system for digital images. The main challenge in every watermarking algorithm is to create a high capable, robust and imperceptible scheme. Unlike other watermarking methods, our system encodes the watermark using a convolutional encoder and embeds the encoded watermark in the transform domain of an image using a direct sequence spread spectrum technique...
In this paper we present a robust watermarking method, in which the watermark is embedded into the magnitude of the middle frequencies of the Discrete Fourier Transform (DFT). To allow the correct watermark detection, even if the image has been distorted, the Speeded Up Robust Feature (SURF) is used. During the embedding process the SURF points are estimated and stored in advance to be used during...
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